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DCB: Add interface to query the state of PFC feature.
[deliverable/linux.git] / net / dcb / dcbnl.c
1 /*
2 * Copyright (c) 2008, Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * Author: Lucy Liu <lucy.liu@intel.com>
18 */
19
20 #include <linux/netdevice.h>
21 #include <linux/netlink.h>
22 #include <net/netlink.h>
23 #include <net/rtnetlink.h>
24 #include <linux/dcbnl.h>
25 #include <linux/rtnetlink.h>
26 #include <net/sock.h>
27
28 /**
29 * Data Center Bridging (DCB) is a collection of Ethernet enhancements
30 * intended to allow network traffic with differing requirements
31 * (highly reliable, no drops vs. best effort vs. low latency) to operate
32 * and co-exist on Ethernet. Current DCB features are:
33 *
34 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
35 * framework for assigning bandwidth guarantees to traffic classes.
36 *
37 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
38 * can work independently for each 802.1p priority.
39 *
40 * Congestion Notification - provides a mechanism for end-to-end congestion
41 * control for protocols which do not have built-in congestion management.
42 *
43 * More information about the emerging standards for these Ethernet features
44 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
45 *
46 * This file implements an rtnetlink interface to allow configuration of DCB
47 * features for capable devices.
48 */
49
50 MODULE_AUTHOR("Lucy Liu, <lucy.liu@intel.com>");
51 MODULE_DESCRIPTION("Data Center Bridging generic netlink interface");
52 MODULE_LICENSE("GPL");
53
54 /**************** DCB attribute policies *************************************/
55
56 /* DCB netlink attributes policy */
57 static struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
58 [DCB_ATTR_IFNAME] = {.type = NLA_STRING, .len = IFNAMSIZ - 1},
59 [DCB_ATTR_STATE] = {.type = NLA_U8},
60 [DCB_ATTR_PFC_CFG] = {.type = NLA_NESTED},
61 [DCB_ATTR_PG_CFG] = {.type = NLA_NESTED},
62 [DCB_ATTR_SET_ALL] = {.type = NLA_U8},
63 [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
64 [DCB_ATTR_CAP] = {.type = NLA_NESTED},
65 [DCB_ATTR_PFC_STATE] = {.type = NLA_U8},
66 };
67
68 /* DCB priority flow control to User Priority nested attributes */
69 static struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
70 [DCB_PFC_UP_ATTR_0] = {.type = NLA_U8},
71 [DCB_PFC_UP_ATTR_1] = {.type = NLA_U8},
72 [DCB_PFC_UP_ATTR_2] = {.type = NLA_U8},
73 [DCB_PFC_UP_ATTR_3] = {.type = NLA_U8},
74 [DCB_PFC_UP_ATTR_4] = {.type = NLA_U8},
75 [DCB_PFC_UP_ATTR_5] = {.type = NLA_U8},
76 [DCB_PFC_UP_ATTR_6] = {.type = NLA_U8},
77 [DCB_PFC_UP_ATTR_7] = {.type = NLA_U8},
78 [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
79 };
80
81 /* DCB priority grouping nested attributes */
82 static struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
83 [DCB_PG_ATTR_TC_0] = {.type = NLA_NESTED},
84 [DCB_PG_ATTR_TC_1] = {.type = NLA_NESTED},
85 [DCB_PG_ATTR_TC_2] = {.type = NLA_NESTED},
86 [DCB_PG_ATTR_TC_3] = {.type = NLA_NESTED},
87 [DCB_PG_ATTR_TC_4] = {.type = NLA_NESTED},
88 [DCB_PG_ATTR_TC_5] = {.type = NLA_NESTED},
89 [DCB_PG_ATTR_TC_6] = {.type = NLA_NESTED},
90 [DCB_PG_ATTR_TC_7] = {.type = NLA_NESTED},
91 [DCB_PG_ATTR_TC_ALL] = {.type = NLA_NESTED},
92 [DCB_PG_ATTR_BW_ID_0] = {.type = NLA_U8},
93 [DCB_PG_ATTR_BW_ID_1] = {.type = NLA_U8},
94 [DCB_PG_ATTR_BW_ID_2] = {.type = NLA_U8},
95 [DCB_PG_ATTR_BW_ID_3] = {.type = NLA_U8},
96 [DCB_PG_ATTR_BW_ID_4] = {.type = NLA_U8},
97 [DCB_PG_ATTR_BW_ID_5] = {.type = NLA_U8},
98 [DCB_PG_ATTR_BW_ID_6] = {.type = NLA_U8},
99 [DCB_PG_ATTR_BW_ID_7] = {.type = NLA_U8},
100 [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
101 };
102
103 /* DCB traffic class nested attributes. */
104 static struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
105 [DCB_TC_ATTR_PARAM_PGID] = {.type = NLA_U8},
106 [DCB_TC_ATTR_PARAM_UP_MAPPING] = {.type = NLA_U8},
107 [DCB_TC_ATTR_PARAM_STRICT_PRIO] = {.type = NLA_U8},
108 [DCB_TC_ATTR_PARAM_BW_PCT] = {.type = NLA_U8},
109 [DCB_TC_ATTR_PARAM_ALL] = {.type = NLA_FLAG},
110 };
111
112 /* DCB capabilities nested attributes. */
113 static struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
114 [DCB_CAP_ATTR_ALL] = {.type = NLA_FLAG},
115 [DCB_CAP_ATTR_PG] = {.type = NLA_U8},
116 [DCB_CAP_ATTR_PFC] = {.type = NLA_U8},
117 [DCB_CAP_ATTR_UP2TC] = {.type = NLA_U8},
118 [DCB_CAP_ATTR_PG_TCS] = {.type = NLA_U8},
119 [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
120 [DCB_CAP_ATTR_GSP] = {.type = NLA_U8},
121 [DCB_CAP_ATTR_BCN] = {.type = NLA_U8},
122 };
123
124 /* DCB capabilities nested attributes. */
125 static struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
126 [DCB_NUMTCS_ATTR_ALL] = {.type = NLA_FLAG},
127 [DCB_NUMTCS_ATTR_PG] = {.type = NLA_U8},
128 [DCB_NUMTCS_ATTR_PFC] = {.type = NLA_U8},
129 };
130
131 /* standard netlink reply call */
132 static int dcbnl_reply(u8 value, u8 event, u8 cmd, u8 attr, u32 pid,
133 u32 seq, u16 flags)
134 {
135 struct sk_buff *dcbnl_skb;
136 struct dcbmsg *dcb;
137 struct nlmsghdr *nlh;
138 int ret = -EINVAL;
139
140 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
141 if (!dcbnl_skb)
142 return ret;
143
144 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, event, sizeof(*dcb), flags);
145
146 dcb = NLMSG_DATA(nlh);
147 dcb->dcb_family = AF_UNSPEC;
148 dcb->cmd = cmd;
149 dcb->dcb_pad = 0;
150
151 ret = nla_put_u8(dcbnl_skb, attr, value);
152 if (ret)
153 goto err;
154
155 /* end the message, assign the nlmsg_len. */
156 nlmsg_end(dcbnl_skb, nlh);
157 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
158 if (ret)
159 goto err;
160
161 return 0;
162 nlmsg_failure:
163 err:
164 kfree(dcbnl_skb);
165 return ret;
166 }
167
168 static int dcbnl_getstate(struct net_device *netdev, struct nlattr **tb,
169 u32 pid, u32 seq, u16 flags)
170 {
171 int ret = -EINVAL;
172
173 /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
174 if (!netdev->dcbnl_ops->getstate)
175 return ret;
176
177 ret = dcbnl_reply(netdev->dcbnl_ops->getstate(netdev), RTM_GETDCB,
178 DCB_CMD_GSTATE, DCB_ATTR_STATE, pid, seq, flags);
179
180 return ret;
181 }
182
183 static int dcbnl_getpfccfg(struct net_device *netdev, struct nlattr **tb,
184 u32 pid, u32 seq, u16 flags)
185 {
186 struct sk_buff *dcbnl_skb;
187 struct nlmsghdr *nlh;
188 struct dcbmsg *dcb;
189 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
190 u8 value;
191 int ret = -EINVAL;
192 int i;
193 int getall = 0;
194
195 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->getpfccfg)
196 return ret;
197
198 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
199 tb[DCB_ATTR_PFC_CFG],
200 dcbnl_pfc_up_nest);
201 if (ret)
202 goto err_out;
203
204 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
205 if (!dcbnl_skb)
206 goto err_out;
207
208 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
209
210 dcb = NLMSG_DATA(nlh);
211 dcb->dcb_family = AF_UNSPEC;
212 dcb->cmd = DCB_CMD_PFC_GCFG;
213
214 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PFC_CFG);
215 if (!nest)
216 goto err;
217
218 if (data[DCB_PFC_UP_ATTR_ALL])
219 getall = 1;
220
221 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
222 if (!getall && !data[i])
223 continue;
224
225 netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
226 &value);
227 ret = nla_put_u8(dcbnl_skb, i, value);
228
229 if (ret) {
230 nla_nest_cancel(dcbnl_skb, nest);
231 goto err;
232 }
233 }
234 nla_nest_end(dcbnl_skb, nest);
235
236 nlmsg_end(dcbnl_skb, nlh);
237
238 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
239 if (ret)
240 goto err;
241
242 return 0;
243 nlmsg_failure:
244 err:
245 kfree(dcbnl_skb);
246 err_out:
247 return -EINVAL;
248 }
249
250 static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlattr **tb,
251 u32 pid, u32 seq, u16 flags)
252 {
253 struct sk_buff *dcbnl_skb;
254 struct nlmsghdr *nlh;
255 struct dcbmsg *dcb;
256 u8 perm_addr[MAX_ADDR_LEN];
257 int ret = -EINVAL;
258
259 if (!netdev->dcbnl_ops->getpermhwaddr)
260 return ret;
261
262 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
263 if (!dcbnl_skb)
264 goto err_out;
265
266 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
267
268 dcb = NLMSG_DATA(nlh);
269 dcb->dcb_family = AF_UNSPEC;
270 dcb->cmd = DCB_CMD_GPERM_HWADDR;
271
272 netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);
273
274 ret = nla_put(dcbnl_skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr),
275 perm_addr);
276
277 nlmsg_end(dcbnl_skb, nlh);
278
279 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
280 if (ret)
281 goto err;
282
283 return 0;
284
285 nlmsg_failure:
286 err:
287 kfree(dcbnl_skb);
288 err_out:
289 return -EINVAL;
290 }
291
292 static int dcbnl_getcap(struct net_device *netdev, struct nlattr **tb,
293 u32 pid, u32 seq, u16 flags)
294 {
295 struct sk_buff *dcbnl_skb;
296 struct nlmsghdr *nlh;
297 struct dcbmsg *dcb;
298 struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
299 u8 value;
300 int ret = -EINVAL;
301 int i;
302 int getall = 0;
303
304 if (!tb[DCB_ATTR_CAP] || !netdev->dcbnl_ops->getcap)
305 return ret;
306
307 ret = nla_parse_nested(data, DCB_CAP_ATTR_MAX, tb[DCB_ATTR_CAP],
308 dcbnl_cap_nest);
309 if (ret)
310 goto err_out;
311
312 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
313 if (!dcbnl_skb)
314 goto err_out;
315
316 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
317
318 dcb = NLMSG_DATA(nlh);
319 dcb->dcb_family = AF_UNSPEC;
320 dcb->cmd = DCB_CMD_GCAP;
321
322 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_CAP);
323 if (!nest)
324 goto err;
325
326 if (data[DCB_CAP_ATTR_ALL])
327 getall = 1;
328
329 for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
330 if (!getall && !data[i])
331 continue;
332
333 if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
334 ret = nla_put_u8(dcbnl_skb, i, value);
335
336 if (ret) {
337 nla_nest_cancel(dcbnl_skb, nest);
338 goto err;
339 }
340 }
341 }
342 nla_nest_end(dcbnl_skb, nest);
343
344 nlmsg_end(dcbnl_skb, nlh);
345
346 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
347 if (ret)
348 goto err;
349
350 return 0;
351 nlmsg_failure:
352 err:
353 kfree(dcbnl_skb);
354 err_out:
355 return -EINVAL;
356 }
357
358 static int dcbnl_getnumtcs(struct net_device *netdev, struct nlattr **tb,
359 u32 pid, u32 seq, u16 flags)
360 {
361 struct sk_buff *dcbnl_skb;
362 struct nlmsghdr *nlh;
363 struct dcbmsg *dcb;
364 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
365 u8 value;
366 int ret = -EINVAL;
367 int i;
368 int getall = 0;
369
370 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->getnumtcs)
371 return ret;
372
373 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
374 dcbnl_numtcs_nest);
375 if (ret) {
376 ret = -EINVAL;
377 goto err_out;
378 }
379
380 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
381 if (!dcbnl_skb) {
382 ret = -EINVAL;
383 goto err_out;
384 }
385
386 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
387
388 dcb = NLMSG_DATA(nlh);
389 dcb->dcb_family = AF_UNSPEC;
390 dcb->cmd = DCB_CMD_GNUMTCS;
391
392 nest = nla_nest_start(dcbnl_skb, DCB_ATTR_NUMTCS);
393 if (!nest) {
394 ret = -EINVAL;
395 goto err;
396 }
397
398 if (data[DCB_NUMTCS_ATTR_ALL])
399 getall = 1;
400
401 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
402 if (!getall && !data[i])
403 continue;
404
405 ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
406 if (!ret) {
407 ret = nla_put_u8(dcbnl_skb, i, value);
408
409 if (ret) {
410 nla_nest_cancel(dcbnl_skb, nest);
411 ret = -EINVAL;
412 goto err;
413 }
414 } else {
415 goto err;
416 }
417 }
418 nla_nest_end(dcbnl_skb, nest);
419
420 nlmsg_end(dcbnl_skb, nlh);
421
422 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
423 if (ret) {
424 ret = -EINVAL;
425 goto err;
426 }
427
428 return 0;
429 nlmsg_failure:
430 err:
431 kfree(dcbnl_skb);
432 err_out:
433 return ret;
434 }
435
436 static int dcbnl_setnumtcs(struct net_device *netdev, struct nlattr **tb,
437 u32 pid, u32 seq, u16 flags)
438 {
439 struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
440 int ret = -EINVAL;
441 u8 value;
442 int i;
443
444 if (!tb[DCB_ATTR_NUMTCS] || !netdev->dcbnl_ops->setstate)
445 return ret;
446
447 ret = nla_parse_nested(data, DCB_NUMTCS_ATTR_MAX, tb[DCB_ATTR_NUMTCS],
448 dcbnl_numtcs_nest);
449
450 if (ret) {
451 ret = -EINVAL;
452 goto err;
453 }
454
455 for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
456 if (data[i] == NULL)
457 continue;
458
459 value = nla_get_u8(data[i]);
460
461 ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
462
463 if (ret)
464 goto operr;
465 }
466
467 operr:
468 ret = dcbnl_reply(!!ret, RTM_SETDCB, DCB_CMD_SNUMTCS,
469 DCB_ATTR_NUMTCS, pid, seq, flags);
470
471 err:
472 return ret;
473 }
474
475 static int dcbnl_getpfcstate(struct net_device *netdev, struct nlattr **tb,
476 u32 pid, u32 seq, u16 flags)
477 {
478 int ret = -EINVAL;
479
480 if (!netdev->dcbnl_ops->getpfcstate)
481 return ret;
482
483 ret = dcbnl_reply(netdev->dcbnl_ops->getpfcstate(netdev), RTM_GETDCB,
484 DCB_CMD_PFC_GSTATE, DCB_ATTR_PFC_STATE,
485 pid, seq, flags);
486
487 return ret;
488 }
489
490 static int dcbnl_setpfcstate(struct net_device *netdev, struct nlattr **tb,
491 u32 pid, u32 seq, u16 flags)
492 {
493 int ret = -EINVAL;
494 u8 value;
495
496 if (!tb[DCB_ATTR_PFC_STATE] || !netdev->dcbnl_ops->setpfcstate)
497 return ret;
498
499 value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);
500
501 netdev->dcbnl_ops->setpfcstate(netdev, value);
502
503 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SSTATE, DCB_ATTR_PFC_STATE,
504 pid, seq, flags);
505
506 return ret;
507 }
508
509 static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlattr **tb,
510 u32 pid, u32 seq, u16 flags, int dir)
511 {
512 struct sk_buff *dcbnl_skb;
513 struct nlmsghdr *nlh;
514 struct dcbmsg *dcb;
515 struct nlattr *pg_nest, *param_nest, *data;
516 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
517 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
518 u8 prio, pgid, tc_pct, up_map;
519 int ret = -EINVAL;
520 int getall = 0;
521 int i;
522
523 if (!tb[DCB_ATTR_PG_CFG] ||
524 !netdev->dcbnl_ops->getpgtccfgtx ||
525 !netdev->dcbnl_ops->getpgtccfgrx ||
526 !netdev->dcbnl_ops->getpgbwgcfgtx ||
527 !netdev->dcbnl_ops->getpgbwgcfgrx)
528 return ret;
529
530 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
531 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
532
533 if (ret)
534 goto err_out;
535
536 dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
537 if (!dcbnl_skb)
538 goto err_out;
539
540 nlh = NLMSG_NEW(dcbnl_skb, pid, seq, RTM_GETDCB, sizeof(*dcb), flags);
541
542 dcb = NLMSG_DATA(nlh);
543 dcb->dcb_family = AF_UNSPEC;
544 dcb->cmd = (dir) ? DCB_CMD_PGRX_GCFG : DCB_CMD_PGTX_GCFG;
545
546 pg_nest = nla_nest_start(dcbnl_skb, DCB_ATTR_PG_CFG);
547 if (!pg_nest)
548 goto err;
549
550 if (pg_tb[DCB_PG_ATTR_TC_ALL])
551 getall = 1;
552
553 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
554 if (!getall && !pg_tb[i])
555 continue;
556
557 if (pg_tb[DCB_PG_ATTR_TC_ALL])
558 data = pg_tb[DCB_PG_ATTR_TC_ALL];
559 else
560 data = pg_tb[i];
561 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
562 data, dcbnl_tc_param_nest);
563 if (ret)
564 goto err_pg;
565
566 param_nest = nla_nest_start(dcbnl_skb, i);
567 if (!param_nest)
568 goto err_pg;
569
570 pgid = DCB_ATTR_VALUE_UNDEFINED;
571 prio = DCB_ATTR_VALUE_UNDEFINED;
572 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
573 up_map = DCB_ATTR_VALUE_UNDEFINED;
574
575 if (dir) {
576 /* Rx */
577 netdev->dcbnl_ops->getpgtccfgrx(netdev,
578 i - DCB_PG_ATTR_TC_0, &prio,
579 &pgid, &tc_pct, &up_map);
580 } else {
581 /* Tx */
582 netdev->dcbnl_ops->getpgtccfgtx(netdev,
583 i - DCB_PG_ATTR_TC_0, &prio,
584 &pgid, &tc_pct, &up_map);
585 }
586
587 if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
588 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
589 ret = nla_put_u8(dcbnl_skb,
590 DCB_TC_ATTR_PARAM_PGID, pgid);
591 if (ret)
592 goto err_param;
593 }
594 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
595 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
596 ret = nla_put_u8(dcbnl_skb,
597 DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
598 if (ret)
599 goto err_param;
600 }
601 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
602 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
603 ret = nla_put_u8(dcbnl_skb,
604 DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
605 if (ret)
606 goto err_param;
607 }
608 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
609 param_tb[DCB_TC_ATTR_PARAM_ALL]) {
610 ret = nla_put_u8(dcbnl_skb, DCB_TC_ATTR_PARAM_BW_PCT,
611 tc_pct);
612 if (ret)
613 goto err_param;
614 }
615 nla_nest_end(dcbnl_skb, param_nest);
616 }
617
618 if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
619 getall = 1;
620 else
621 getall = 0;
622
623 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
624 if (!getall && !pg_tb[i])
625 continue;
626
627 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
628
629 if (dir) {
630 /* Rx */
631 netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
632 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
633 } else {
634 /* Tx */
635 netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
636 i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
637 }
638 ret = nla_put_u8(dcbnl_skb, i, tc_pct);
639
640 if (ret)
641 goto err_pg;
642 }
643
644 nla_nest_end(dcbnl_skb, pg_nest);
645
646 nlmsg_end(dcbnl_skb, nlh);
647
648 ret = rtnl_unicast(dcbnl_skb, &init_net, pid);
649 if (ret)
650 goto err;
651
652 return 0;
653
654 err_param:
655 nla_nest_cancel(dcbnl_skb, param_nest);
656 err_pg:
657 nla_nest_cancel(dcbnl_skb, pg_nest);
658 nlmsg_failure:
659 err:
660 kfree(dcbnl_skb);
661 err_out:
662 ret = -EINVAL;
663 return ret;
664 }
665
666 static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlattr **tb,
667 u32 pid, u32 seq, u16 flags)
668 {
669 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 0);
670 }
671
672 static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlattr **tb,
673 u32 pid, u32 seq, u16 flags)
674 {
675 return __dcbnl_pg_getcfg(netdev, tb, pid, seq, flags, 1);
676 }
677
678 static int dcbnl_setstate(struct net_device *netdev, struct nlattr **tb,
679 u32 pid, u32 seq, u16 flags)
680 {
681 int ret = -EINVAL;
682 u8 value;
683
684 if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->setstate)
685 return ret;
686
687 value = nla_get_u8(tb[DCB_ATTR_STATE]);
688
689 netdev->dcbnl_ops->setstate(netdev, value);
690
691 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_SSTATE, DCB_ATTR_STATE,
692 pid, seq, flags);
693
694 return ret;
695 }
696
697 static int dcbnl_setpfccfg(struct net_device *netdev, struct nlattr **tb,
698 u32 pid, u32 seq, u16 flags)
699 {
700 struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
701 int i;
702 int ret = -EINVAL;
703 u8 value;
704
705 if (!tb[DCB_ATTR_PFC_CFG] || !netdev->dcbnl_ops->setpfccfg)
706 return ret;
707
708 ret = nla_parse_nested(data, DCB_PFC_UP_ATTR_MAX,
709 tb[DCB_ATTR_PFC_CFG],
710 dcbnl_pfc_up_nest);
711 if (ret)
712 goto err;
713
714 for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
715 if (data[i] == NULL)
716 continue;
717 value = nla_get_u8(data[i]);
718 netdev->dcbnl_ops->setpfccfg(netdev,
719 data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
720 }
721
722 ret = dcbnl_reply(0, RTM_SETDCB, DCB_CMD_PFC_SCFG, DCB_ATTR_PFC_CFG,
723 pid, seq, flags);
724 err:
725 return ret;
726 }
727
728 static int dcbnl_setall(struct net_device *netdev, struct nlattr **tb,
729 u32 pid, u32 seq, u16 flags)
730 {
731 int ret = -EINVAL;
732
733 if (!tb[DCB_ATTR_SET_ALL] || !netdev->dcbnl_ops->setall)
734 return ret;
735
736 ret = dcbnl_reply(netdev->dcbnl_ops->setall(netdev), RTM_SETDCB,
737 DCB_CMD_SET_ALL, DCB_ATTR_SET_ALL, pid, seq, flags);
738
739 return ret;
740 }
741
742 static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlattr **tb,
743 u32 pid, u32 seq, u16 flags, int dir)
744 {
745 struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
746 struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
747 int ret = -EINVAL;
748 int i;
749 u8 pgid;
750 u8 up_map;
751 u8 prio;
752 u8 tc_pct;
753
754 if (!tb[DCB_ATTR_PG_CFG] ||
755 !netdev->dcbnl_ops->setpgtccfgtx ||
756 !netdev->dcbnl_ops->setpgtccfgrx ||
757 !netdev->dcbnl_ops->setpgbwgcfgtx ||
758 !netdev->dcbnl_ops->setpgbwgcfgrx)
759 return ret;
760
761 ret = nla_parse_nested(pg_tb, DCB_PG_ATTR_MAX,
762 tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest);
763 if (ret)
764 goto err;
765
766 for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
767 if (!pg_tb[i])
768 continue;
769
770 ret = nla_parse_nested(param_tb, DCB_TC_ATTR_PARAM_MAX,
771 pg_tb[i], dcbnl_tc_param_nest);
772 if (ret)
773 goto err;
774
775 pgid = DCB_ATTR_VALUE_UNDEFINED;
776 prio = DCB_ATTR_VALUE_UNDEFINED;
777 tc_pct = DCB_ATTR_VALUE_UNDEFINED;
778 up_map = DCB_ATTR_VALUE_UNDEFINED;
779
780 if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
781 prio =
782 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);
783
784 if (param_tb[DCB_TC_ATTR_PARAM_PGID])
785 pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);
786
787 if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
788 tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);
789
790 if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
791 up_map =
792 nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);
793
794 /* dir: Tx = 0, Rx = 1 */
795 if (dir) {
796 /* Rx */
797 netdev->dcbnl_ops->setpgtccfgrx(netdev,
798 i - DCB_PG_ATTR_TC_0,
799 prio, pgid, tc_pct, up_map);
800 } else {
801 /* Tx */
802 netdev->dcbnl_ops->setpgtccfgtx(netdev,
803 i - DCB_PG_ATTR_TC_0,
804 prio, pgid, tc_pct, up_map);
805 }
806 }
807
808 for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
809 if (!pg_tb[i])
810 continue;
811
812 tc_pct = nla_get_u8(pg_tb[i]);
813
814 /* dir: Tx = 0, Rx = 1 */
815 if (dir) {
816 /* Rx */
817 netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
818 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
819 } else {
820 /* Tx */
821 netdev->dcbnl_ops->setpgbwgcfgtx(netdev,
822 i - DCB_PG_ATTR_BW_ID_0, tc_pct);
823 }
824 }
825
826 ret = dcbnl_reply(0, RTM_SETDCB,
827 (dir ? DCB_CMD_PGRX_SCFG : DCB_CMD_PGTX_SCFG),
828 DCB_ATTR_PG_CFG, pid, seq, flags);
829
830 err:
831 return ret;
832 }
833
834 static int dcbnl_pgtx_setcfg(struct net_device *netdev, struct nlattr **tb,
835 u32 pid, u32 seq, u16 flags)
836 {
837 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 0);
838 }
839
840 static int dcbnl_pgrx_setcfg(struct net_device *netdev, struct nlattr **tb,
841 u32 pid, u32 seq, u16 flags)
842 {
843 return __dcbnl_pg_setcfg(netdev, tb, pid, seq, flags, 1);
844 }
845
846 static int dcb_doit(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
847 {
848 struct net *net = sock_net(skb->sk);
849 struct net_device *netdev;
850 struct dcbmsg *dcb = (struct dcbmsg *)NLMSG_DATA(nlh);
851 struct nlattr *tb[DCB_ATTR_MAX + 1];
852 u32 pid = skb ? NETLINK_CB(skb).pid : 0;
853 int ret = -EINVAL;
854
855 if (net != &init_net)
856 return -EINVAL;
857
858 ret = nlmsg_parse(nlh, sizeof(*dcb), tb, DCB_ATTR_MAX,
859 dcbnl_rtnl_policy);
860 if (ret < 0)
861 return ret;
862
863 if (!tb[DCB_ATTR_IFNAME])
864 return -EINVAL;
865
866 netdev = dev_get_by_name(&init_net, nla_data(tb[DCB_ATTR_IFNAME]));
867 if (!netdev)
868 return -EINVAL;
869
870 if (!netdev->dcbnl_ops)
871 goto errout;
872
873 switch (dcb->cmd) {
874 case DCB_CMD_GSTATE:
875 ret = dcbnl_getstate(netdev, tb, pid, nlh->nlmsg_seq,
876 nlh->nlmsg_flags);
877 goto out;
878 case DCB_CMD_PFC_GCFG:
879 ret = dcbnl_getpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
880 nlh->nlmsg_flags);
881 goto out;
882 case DCB_CMD_GPERM_HWADDR:
883 ret = dcbnl_getperm_hwaddr(netdev, tb, pid, nlh->nlmsg_seq,
884 nlh->nlmsg_flags);
885 goto out;
886 case DCB_CMD_PGTX_GCFG:
887 ret = dcbnl_pgtx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
888 nlh->nlmsg_flags);
889 goto out;
890 case DCB_CMD_PGRX_GCFG:
891 ret = dcbnl_pgrx_getcfg(netdev, tb, pid, nlh->nlmsg_seq,
892 nlh->nlmsg_flags);
893 goto out;
894 case DCB_CMD_SSTATE:
895 ret = dcbnl_setstate(netdev, tb, pid, nlh->nlmsg_seq,
896 nlh->nlmsg_flags);
897 goto out;
898 case DCB_CMD_PFC_SCFG:
899 ret = dcbnl_setpfccfg(netdev, tb, pid, nlh->nlmsg_seq,
900 nlh->nlmsg_flags);
901 goto out;
902
903 case DCB_CMD_SET_ALL:
904 ret = dcbnl_setall(netdev, tb, pid, nlh->nlmsg_seq,
905 nlh->nlmsg_flags);
906 goto out;
907 case DCB_CMD_PGTX_SCFG:
908 ret = dcbnl_pgtx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
909 nlh->nlmsg_flags);
910 goto out;
911 case DCB_CMD_PGRX_SCFG:
912 ret = dcbnl_pgrx_setcfg(netdev, tb, pid, nlh->nlmsg_seq,
913 nlh->nlmsg_flags);
914 goto out;
915 case DCB_CMD_GCAP:
916 ret = dcbnl_getcap(netdev, tb, pid, nlh->nlmsg_seq,
917 nlh->nlmsg_flags);
918 goto out;
919 case DCB_CMD_GNUMTCS:
920 ret = dcbnl_getnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
921 nlh->nlmsg_flags);
922 goto out;
923 case DCB_CMD_SNUMTCS:
924 ret = dcbnl_setnumtcs(netdev, tb, pid, nlh->nlmsg_seq,
925 nlh->nlmsg_flags);
926 goto out;
927 case DCB_CMD_PFC_GSTATE:
928 ret = dcbnl_getpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
929 nlh->nlmsg_flags);
930 goto out;
931 case DCB_CMD_PFC_SSTATE:
932 ret = dcbnl_setpfcstate(netdev, tb, pid, nlh->nlmsg_seq,
933 nlh->nlmsg_flags);
934 goto out;
935 default:
936 goto errout;
937 }
938 errout:
939 ret = -EINVAL;
940 out:
941 dev_put(netdev);
942 return ret;
943 }
944
945 static int __init dcbnl_init(void)
946 {
947 rtnl_register(PF_UNSPEC, RTM_GETDCB, dcb_doit, NULL);
948 rtnl_register(PF_UNSPEC, RTM_SETDCB, dcb_doit, NULL);
949
950 return 0;
951 }
952 module_init(dcbnl_init);
953
954 static void __exit dcbnl_exit(void)
955 {
956 rtnl_unregister(PF_UNSPEC, RTM_GETDCB);
957 rtnl_unregister(PF_UNSPEC, RTM_SETDCB);
958 }
959 module_exit(dcbnl_exit);
960
961
Linux kernel - Deliverables
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